<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>登录</title>
</head>
<body>
    <h1>登录</h1>
    <p th:text="${msg}" style="color: red"></p>
     <form th:action="@{/login}">
         <p>用户名:<input name="username" /></p>
         <p>密码:<input name="password" /></p>
         <p><input type="submit" value="登录" /></p>
     </form>
</body>
</html>